LIST OF ILLUSTRATIONS xxiii 



FIG. PAGE 



220. Eye of man, diagrammatic horizontal section . . -357 



221. Petromyzon marinus 361 



222. Myxine glutinosa, head 362 



223. Petromyzon marinus 363 



224. Scyllium canicula, side view of skull 371 



225. Scyllium, pectoral arch 373 



226. Scyllium canicula, dissection 376 



227. Diagram of the vascular system of a fish .... 378 



228. Scyllium catulus 382 



229. Dogfish, egg-case 385 



230. Scyllium, embryo, with gills, etc. 386 



231. Lamna cornubica - . 387 



232. European sting-ray (Urolophus cruciatus) .... 388 



233. Skeleton of Urolophus testaceus 390 



234. Heptanchus, side view of skull . . . . . 391 



235. Salmo fario, fins, etc 395 



236. Salmo fario, caudal end of vertebral column . . . 397 



237. Pleuronectes cynoglossus 398 



238. Ctenoid and ganoid scales . . . . . . . 399 



239. Polypterus birchir . . 399 



240. Skull of sturgeon . 400 



241. Salmo fario, entire skull, left side ." . . * . 401 



242. Premaxillae of Sargus 402 



243. Hippocampus (sea-horse) 404 



244. Ceratodus fosteri 405 



245. Ceratodus fosteri, anterior portion of skeleton . . . 406 



246. Rana temporaria 409 



247. Rana temporaria, skeleton 412 



248. Rana temporaria, skull, different views . , . .413 



249. Rana esculenta, shoulder girdle 415 



250. Rana esculenta, pelvic girdle from right side . . .416 



251. Rana temporaria, dissection from left side . . . .417 



252. Rana temporaria, heart with cavities laid open . . . 420 



253. Rana temporaria, arterial system, etc 421 



254. Rana temporaria, venous system, etc. ..... 424 



255. Rana esculenta, brain from above and below . . . 426 



256. Rana esculenta, urinogenital organs of male .... 428 



257. Rana esculenta, urinogenital organs of female . . . 429 



